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7 of 58 lessons about Websites, intermediate level Show all lessons
Data security and encryption
How data is kept unreadable to anyone who should not see it: encryption, certificates, TLS and hashing.
1 of 8 lessons shown
Websites, hosting and domains
What happens between typing an address and seeing a page: domains, DNS, hosting, HTTPS and CDNs.
4 of 9 lessons shown
- What DNS is, and why your business depends on it DNS turns your domain name into the addresses that run your website and email. What the records mean, and how to change them safely. Intermediate 2 min read
- Domain name vs web hosting: what’s the difference? The domain name is the address and the hosting is where the website lives. Why they are separate, and why the business should hold both logins. Intermediate 3 min read
- HTTP vs HTTPS: what’s the difference? HTTP sends web pages in the open and HTTPS sends them encrypted. What visitors see in the browser, and what moving a site to HTTPS involves. Intermediate 3 min read
- What is a content delivery network (CDN)? A CDN keeps copies of your website on servers in many places, so each visitor is served from one nearby. What it speeds up and what it cannot. Intermediate 3 min read
Search and website performance
Being found and being fast: how search engines read a site, caching and Core Web Vitals.
2 of 4 lessons shown
- What is technical SEO? Technical SEO is the part that makes sure search engines can reach, read and store your pages. What robots.txt, sitemaps and canonical addresses do. Intermediate 3 min read
- Core Web Vitals, explained Three measurements Google uses to judge how a page feels to use: how fast it loads, how quickly it responds and how steady it is. Intermediate 2 min read
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